Salesforce Certified JavaScript Developer Exam Study Guide

Salesforce Certified JavaScript Developer Preparation Details

The Salesforce Certified JavaScript Developer exam validates core JavaScript skills across variables, objects, functions, classes, browser events, debugging, asynchronous programming, server-side JavaScript, and testing. This guide maps every official exam objective to trusted documentation so you can study each topic in depth before test day. It is a platform-agnostic exam, so the resources below focus on JavaScript fundamentals rather than Salesforce-specific tools. You can also explore more Salesforce certification study guides on the Salesforce Certification category to keep building your skills.

Salesforce Certified JavaScript Developer Materials

Coursera	IBM Full-Stack JavaScript Developer
Udemy	Salesforce Certified JavaScript Developer Exam Prep
Whizlabs	Salesforce JavaScript Developer I certification

Variables, Types, and Collections: 23%

Given a scenario, write code to create variables and initialize them correctly.

Grammar and types

var

let

const

Given a business requirement, utilize strings, numbers, and dates effectively.

Numbers and strings

String

Number

Date

Representing dates & times

Given a scenario or example, demonstrate awareness of type coercion and its effects.

Type coercion

Equality comparisons and sameness

JavaScript data structures

Given a specific scenario, distinguish truthy or falsey evaluations.

Truthy

Falsy

Boolean

Given a list of data, demonstrate data manipulation with arrays.

Array

Indexed collections

Array.prototype.map()

Array.prototype.filter()

Array.prototype.reduce()

Given a JSON response, demonstrate how to operate the JSON object.

JSON

JSON.parse()

JSON.stringify()

Objects, Functions, and Classes: 25%

Given a business requirement, locate the best function implementation.

Functions

Function

Arrow function expressions

Closures

Given a business requirement, apply fundamentals of object implementation to solve the business requirement.

Working with objects

Object

Object.keys()

Object.assign()

Given a business requirement, apply fundamentals of class implementation to solve the business requirement.

Classes

Using classes

extends

Inheritance and the prototype chain

Given a JavaScript module, give examples of how to use the module.

JavaScript modules

import

export

Given a block of code, analyze the variable scope and the execution flow.

Scope

Hoisting

JavaScript execution model

this

Browser and Events: 17%

Given a business requirement, utilize Events, event handlers, and propagation.

Introduction to events

Event bubbling

EventTarget: addEventListener() method

Event: stopPropagation() method

Given a business requirement, evaluate and manipulate the DOM.

DOM scripting introduction

Document Object Model (DOM)

Document: querySelector() method

Node

Given a scenario, utilize the Browser Dev Tools to investigate code behavior.

What are browser developer tools?

Pause your code with breakpoints

console

Given a scenario and requirements, utilize browser specific APIs.

Web APIs

Window

Window: fetch() method

Window: localStorage property

Debugging and Error Handling: 7%

Given a scenario, handle errors properly.

Control flow and error handling

try…catch

throw

Error

Given code to be debugged, use the console and breakpoints.

console

console: log() static method

Pause your code with breakpoints

Asynchronous Programming: 13%

Given a scenario, apply asynchronous programming concepts.

Using promises

Promise

async function

await

Given a scenario, use event loop and event monitor or determine loop outcomes.

JavaScript execution model

The Node.js Event Loop, Timers, and process.nextTick()

Window: setTimeout() method

Server Side JavaScript: 8%

Given a scenario and requirements, infer which Node.js implementation is a good solution.

Introduction to Node.js

Differences between Node.js and the Browser

Usage and example

Given a scenario and requirements, infer which Node.js CLI command is a good solution.

Command-line API

Know the core Node.js modules and given requirements, infer which Node.js library/framework is a good solution.

File system

HTTP

Path

Given a scenario and requirements, distinguish which Node.Js Package Management solution is the most fitting.

Modules: Packages

package.json

Creating a package.json file

Testing: 7%

With a block of code and the associated Unit Test, determine where the test is ineffective and modify it to make it more effective.

Discovering Node.js’s test runner

Using Node.js’s test runner

Test runner

Assertion testing

Wrapping Up Salesforce Certified JavaScript Developer

This guide walked through every domain of the Salesforce Certified JavaScript Developer exam, from variables and collections through objects, classes, browser events, debugging, asynchronous programming, server-side JavaScript, and testing. Working through the linked MDN and Node.js documentation for each objective is one of the most reliable ways to prepare, since the exam draws directly on core JavaScript fundamentals. You can also explore more Salesforce certification study guides on the Salesforce Certification category to keep building your skills. Have a question or tip? Leave a comment below.

Receive Updates on Salesforce Certified JavaScript Developer Exam

• youtube channel ravikirans
• facebook page ravikirans
• linkedin page ravikirans

---

Want to be notified as soon as I post? Subscribe to the RSS feed / leave your email address in the subscribe section. Share the article to your social networks with the below links so it can benefit others.

Share the Salesforce Certified JavaScript Developer Study Guide in Your Network